package liang.eight.edition.inheritance.polymorphism;

public class Circle extends GeometricObject {
	private double radius;

	public Circle() {
	}

	public Circle(double radius) {
		this.radius = radius;
	}

	/** Return radius */
	public double getRadius() {
		return radius;
	}

	/** Set a new radius */
	public void setRadius(double radius) {
		this.radius = radius;
	}

	/** Return area */
	public double getArea() {
		return radius * radius * Math.PI;
	}

	/** Return diameter */
	public double getDiameter() {
		return 2 * radius;
	}

	/** Return perimeter */
	public double getPerimeter() {
		return 2 * radius * Math.PI;
	}

	/* Print the circle info */
	public void printCircle() {
		System.out.println("The circle is created " + getDateCreated() + " and the radius is " + radius);
	}
}
